ML18037A169

LER 79-010/03L-0 on 790424:during Refueling Outage, Containment Vacuum Relief Valve 68 IV-10 Flange Failed Leak Rate test.O-rings Replaced on Flange

ML18037A169
Person / Time
Site:	Nine Mile Point
Issue date:	05/23/1979
From:	Duda E NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML17053A699	List: ML17053A698 ML18037A169
References
LER-79-010-03L, LER-79-10-3L, NUDOCS 7905300496
Download: ML18037A169 (2)

Text

~RM~3RM 366 U. S. NUCLEAR REGULATORY COMMISSION (7-77)

LICENSEE EVENT REPORT CONTROL BLOCK:

I ,Q IPLEASE PRINT OR TYPE ALL REQUIREO INFORMATION)

~0 8 9 N Y N LICENSEE CODE t4 P 1 14 Q20 15 0 - 0 0 0 0 LICENSE NUMBER 0 0 0 25 Qs 26 4 1 LICENSE I I TYPE30 Q4~ 57 CAT 58 Os CON'T

~o 7 8

,",'""O'E

~QB 60 61 0 5 0 0 0 DOCKET NUMBER 2 2 0 68 7

69 0 4 2 4 EVENT DATE I 9 74 Q'5 REPORT DATE 80 Qg EVENT DESCRIPTION ANO PROBABLE CONSEQUENCES QIO 0;2 ,"During refueling outage, containment vacuum relief valve (68 IV-10)

~03 flange failed its leak rate test. This resulted in minimal safety implications since the unit was shutdown for refueling.

~OS

~06

~07

~OB 80 7 8 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE g ~S0 O11 ~EQ12 ~XQI3 V A L V E X Q4 ~BGs ~C Qls 7 8 9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION G7 LER RO sss0ss ACTION, FUTURE EVENT YEAR

~79 21 22 EFFECT

+

23 SHUTDOWN

~01 24 REPORT NO.

0 26

+~

27

~01 28 ATTACHMENT CODE 29 NPRDX TYPE

+L 30 PRIME COMP.

31

+0 NO.

32 COMPONENT TAKEN ACTION ON PI.ANT hIETHOD HOURS ~22 SUBMITTED FORM SUB. SUPPLIER MANUFACTUR R 33 QIB ~Q)g 34

~Q20 35

~Q2 36 37 0 0 0 0 40

~N 41 Q23 ~NQ24 ~AQ25 44 A 1 8 0 47 Q26 42 43 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 0-rings were replaced on flange of containment vacuum relief valve (68'Y-10), which subsequently passed its leak rate test.

3

~14 7 8 9 80 FACILITY METHOD OF STATUS ~~s POWER OTHER STATUS Q30 DISCOVERY DISCOVERY DESCRIPTION Q32 5

8

~N 9

Q28 ~00 10 0

12 Qss NA 44

~B 45 Q31 Leak Rate Test

&0 7 13 46 ACTIVITY CONTENT RELEASEO OF RELEASE AMOUNT OF ACTIVITYQS LOCATION OF RELEASE Q36 6 ~Z Q33 ~ZQ34 NA NA 7 8 9 . 10 11 44 45 80 PERSONNFL EXPOSURES NUMBER TYPE DESCRIPTION Q3g

~le ~00 0 Qav ~ZQss NA 80 7 8 9 11 12 13 PFRSQNNEL INJURIES NUMBER OESCRIPTIONQ41

~OO O

8) NA 7 8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY TYPE DESCRIPTION Q43

~ZQ42 NA 7 8 9 'IO 80 O

ISSUED L>J PUBLICITY 044 DESCRIPTION ~ NRC USE ONLY ss 8 9 10 68 69 80 E. Duda PHQNE(315)343-2110 Ext 1306 NAME OF PREPARFR 53 00 +AC